Download MendeleyThe unusual structure of the PiggyMac cysteine-rich domain reveals zinc finger diversity in PiggyBac-related transposases.
Guerineau, M., Bessa, L., Moriau, S., Lescop, E., Bontems, F., Mathy, N., Guittet, E., Bischerour, J., Betermier, M., Morellet, N.(2021) Mob DNA 12: 12-12
- PubMed: 33926516
- DOI: https://doi.org/10.1186/s13100-021-00240-4
- Primary Citation of Related Structures:
6ZOP - PubMed Abstract:
Transposons are mobile genetic elements that colonize genomes and drive their plasticity in all organisms. DNA transposon-encoded transposases bind to the ends of their cognate transposons and catalyze their movement. In some cases, exaptation of transposon genes has allowed novel cellular functions to emerge. The PiggyMac (Pgm) endonuclease of the ciliate Paramecium tetraurelia is a domesticated transposase from the PiggyBac family. It carries a core catalytic domain typical of PiggyBac-related transposases and a short cysteine-rich domain (CRD), flanked by N- and C-terminal extensions. During sexual processes Pgm catalyzes programmed genome rearrangements (PGR) that eliminate ~ 30% of germline DNA from the somatic genome at each generation. How Pgm recognizes its DNA cleavage sites in chromatin is unclear and the structure-function relationships of its different domains have remained elusive.
Organizational Affiliation:
Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 1 Avenue de la Terrasse, 91198, Gif sur Yvette Cedex, France.
